The Campaign Management APIs also include a series of performance endpoints, which
are meant to quickly retrieve performance metrics and information for your
campaigns, goals and ads. These endpoints allow you to build your own interfaces to
view the information in your account.

Take the following considerations into account when using to the
Performance REST API endpoints:

The Performance endpoints give you quick access to the data collected for
your campaigns, goals and ads, with only an ingestion delay of one
hour.

The Performance endpoints provide totals for the requested metrics. If you
need a breakdown of the metrics based on time, like for each month, then use
the Custom Reporting API.

The Performance endpoints provide the metrics described in the endpoints for
the campaigns, goals and ads. If you require other metrics, then use the
Custom Reporting API.

Use the Campaign API to define general settings for the campaign
and retrieve performance metrics for the campaign and its associated
goals and ads. Give the campaign a name, associate it with a client,
set the campaign priority, delivery mode and targeting rules. You
can then add goals and ads through endpoints described further down
in the table.

A goal is a schedule or placement that determines the delivery of
your ads. Use the Goal API to define, for example, how many
impressions should be delivered, at what frequency, how they appear
in ad breaks, the targeting rules, the start/end date of the
campaign and to retrieve perfomance metrics for the goals. You can
have multiple goals in a campaign if you, for example, need to reach
different target audiences, or deliver during different time
periods. You can then add ads through endpoints described further
down in the table.

Use the Ad API to link an asset to an ad, add one or more ads of
supported format to a goal, target ads to specific device groups,
and set a different start/end date than the one set for the goal.
Also use the Ad API to retrieve performance metrics for the
ads.

Note: Uploaded assets that have not been linked to an ad
expire after 24 hours. Querying for expired assets returns a 404
(Not Found) error.